Optical lens



FIG. 1 is a perspective view of an optical lens showing our new design, wherein bounds for a bottom light input surface and four side surfaces are shown in broken lines which are for illustrative purposes only and form no part of the claimed design.

FIG. 2 is a front elevational view thereof.

FIG. 3 is a rear elevational view thereof.

FIG. 4 is a left-side, elevational view thereof.

FIG. 5 is a right-side, elevational view thereof.

FIG. 6 is a top plan view thereof; and,

FIG. 7 is a bottom plan view thereof. 

The ornamental design for an optical lens, as shown and described. 